diagram.
THE MOST MARVELLOUS PUMP
known is the heart. We give in Fig. 178 a diagrammatic sketch of the system of blood circulation in the human body, showing the heart, the arteries, and the veins, big and
Table of Contents
HOW IT WORKS.
324
diagram.
THE MOST MARVELLOUS PUMP
known is the heart. We give in Fig. 178 a diagrammatic sketch of the system of blood circulation in the human body, showing the heart, the arteries, and the veins, big and